Apparatus for burning stumps.



G. C. SUTTON, I. W. GROWL d.; J. O. HAMBERG. APPARATUS FOR BURNING STUMPS.

APPLICATION FILED APR. 15, 1913.

1, 1 1 1,241 A Patented sept. 22, 1914.

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v `Application ledApril 15,

To all whom t may concern:

Be it known that we, GEORGE C.y SUTTON, ISAAC W. CRowL, and JOHN. O. Harmens, citizens of the United States, residing atv Priest River, county of Bonner, and State of Idaho, have invented certain new and use-v ful Improvements in Apparatus for Burning Stumps, of which the following is a specification.

This invention relates to apparatus for burning stumps. y

Our object is to provide an improved apparatus for burning stumps whereby combustion may be initiated and continued `1n the interior of the stump, draft prevented through the cut-off or exposed top of the stump, and the products of combustion conveyed from the interior of the stump for eX- traction or recovery, by distillation or con-y densation, of the commercially valuable products such as tar, acids, etc., contained in the stump and the valueless products passed of into the atmosphere.

The invention consists ofdraft `and take ofi'l apparatus combined withv a cap which 1s` used to seal theexpo'sed upper face or top Y of the stump, as fully set forth hereinafter.

The accompanyingv drawing is Va perspective, with certain parts broken away, showlf the apparatusf Preferably, at or near the center of the stump 1 a hole 2 is bored down `from the t upper face thereof, a suitable distance, say ten or twelve inches below the level of the earth outside the stump. Another hole 3 is then bored into the stumpl in a general lateral direction, commencing about the level of the earth and inclined downwardly so that it will intersect the hole 2 'at'or near the lower end thereof. A fire is then started, by any suitable means or in any'preferred manner at or about the point 2ri where the holes 2 and 3 intersect and the combustion is allowed to continue until the upper `end part of the Vhole 2 has become slightly en larged. A pipe 4,'preferably of metahand provided with any suitable air valve or controlling device 5 at its outer part, is inserted in the hole 3 to within a few inches of where holes 2 and 3 intersect at 2a. This pipe constitutes av draft pipe and the amount of air admitted to the lire at 2aL may be regulated by the valve 5.

At or about the time the pipe t'isinserted, a pipe 6, preferably of metal, and of suitable `Specification of Letters Patent. f y i' `Pajnged Sept `191s.` .serial No. 761,231. 7

diameter, Isay `two inches, more or less, is inserted in the hole 2 after the said holel 2 has'become slightly enlarged at vits top by the'fire. vThe pipe 6 is entered into the hole 2 to a distance within a few inches above the point 2, the'upper end of the pipe extending above the top of the stump. A flat sheet of metal 7 1s then fastened to the top l yof the stump by nails or other fastenings 7a,

or otherwise lpositioned thereon and it is provided with any suitable means such as 7b to engage the pipe 6 and prevent the latter from dropping. The plate or disk 7 prevents the re from breaking out around the point where the pipe 6 passes through the upper face of the stump and also keeps the stump from burning to any appreciable eX- tent above the lower end of the pipe 6 by preventing draft through the previously eX- posed upper face of the stump.

The foregoing steps having been taken, a hood or cover S Ofany desired form and preferably of metal, is placed around the stump and incloses it and the pipe 6 and plate 7, this hood 8 being preferably considerably larger than the stump to allow a free space between it and the stump. The hood `bustion from which the commercially valu able products such as tar, acids, etc. may be recovered by condensation,distillation, or in any other suitable manner.

As soon as the fire has gotten well under way in the center of the stump 1, the draft through the pipes 4 and 11 is partially cut oftl by regulating damper l5. The .stump then acts as a retort and the smoke and gases generated by the combustion within, pass up through hood 8, andpipe 11. In this man ner the stump 1 isentirely consumed eventually and the valuable distillates therefrom are obtained. Y I

The apparatus may `l`be made in several sizes adapting it to stumps of different sizes.

ters Patent, is :v o s t l. An apparatus for burning` stumps, em-v Having' thus described our invention, what we claim as new and desire to secure by Letbodying a pipe extending Within the stump and adapted for conveying off the productsof combustion from the interior of the stump7 and a cap combined With said pipe which is located directly on top ofandxcow.

@ringthe stump.

2. An apparatus for burning stumps, embodying' a pipe extendingjwithin the stump and adapted for conveyinv oil? the products of combustion froin the Vinteriorl "of the stump, a cap combined Withv said pipel which is located directly on topl of and" coveringr the stump, and a draft supplying pipe inserted'laterally in the stump.

f In vtestimony whereof, We hereunto affix our signatures 1n presence of tWoWitnesses.

Copies of this patent may be obtained for ve c ents each, by addressing the i `Washington, D. C.

Commissioner ofratents, 

